76251321 ÷ 388 
The aim is to understand the frequency of 388 in 76251321.

Moving on to step 1:
When dividing 7 by 388, we get 0 with a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Append the next digit (6) from the dividend to 7 and continue with: 76 / 388

Let's proceed to step 2:
76 divided by 388 is 0 with a remainder of 76.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 76 leaves us with 76.
Bring next digit (2) of the dividend behind the 76 and repeat the process: 762 / 388

Going ahead to step 3:
388 can be fit into 762 1 times, resulting in a remainder of 374.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Deduct 388 from 762 and we're left with 374.
Append the next digit (5) from the dividend to 374 and continue with: 3745 / 388

On to step 4:
If we divide 3745 by 388, we get 9 and a remainder of 253.
Write down 9 as next digit of the result. 
Result so far: 19.0
Subtract 3492 from 3745 to get 253.
Take the next digit (1) from the dividend and append it to 253, then repeat: 2531 / 388

Moving on to step 5:
388 goes into 2531 6 times with a remainder of 203.
Put 6 as the next digit of the answer. 
Result so far: 196.0
The remainder is 203 after subtracting 2328 from 2531.
Include the next digit (3) from the dividend after 203, then repeat: 2033 / 388

Advancing to step 6:
The number 388 fits into 2033 5 times, leaving a remainder of 93.
Put 5 as the next digit of the answer. 
Result so far: 1965.0
If we take 1940 away from 2033, we end up with 93.
Include the next digit (2) from the dividend after 93, then repeat: 932 / 388

Step 7:
388 can be fit into 932 2 times, resulting in a remainder of 156.
Write down 2 as next digit of the result. 
Result so far: 19652.0
Subtract 776 from 932 to get 156.
Append the next digit (1) from the dividend to 156 and continue with: 1561 / 388

On to step 8:
When dividing 1561 by 388, we get 4 with a remainder of 9.
Put 4 as the next digit of the answer. 
Result so far: 196524.0
If we take 1552 away from 1561, we end up with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Step 9:
If we divide 90 by 388, we get 0 and a remainder of 90.
The number 0 becomes the next digit in our result. 
Result so far: 196524.0
If we subtract 0 from 90, we get 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

Moving on to step 10:
388 can be fit into 900 2 times, resulting in a remainder of 124.
The next digit of our result is 2. 
Result so far: 196524.02
The remainder is 124 after subtracting 776 from 900.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1240, and continue the process.

Let's proceed to step 11:
388 can be fit into 1240 3 times, resulting in a remainder of 76.
Use 3 as the next digit of our solution. 
Result so far: 196524.023
Deduct 1164 from 1240 and we're left with 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Moving on to step 12:
The number 388 fits into 760 1 times, leaving a remainder of 372.
Put 1 as the next digit of the answer. 
Result so far: 196524.0231
The remainder is 372 after subtracting 388 from 760.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3720, and continue the process.

Let's proceed to step 13:
If we divide 3720 by 388, we get 9 and a remainder of 228.
Use 9 as the next digit of our solution. 
Result so far: 196524.02319
The remainder is 228 after subtracting 3492 from 3720.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2280, and continue the process.

Moving on to step 14:
When dividing 2280 by 388, we get 5 with a remainder of 340.
Use 5 as the next digit of our solution. 
Result so far: 196524.023195
If we take 1940 away from 2280, we end up with 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3400, and continue the process.

Advancing to step 15:
388 can be fit into 3400 8 times, resulting in a remainder of 296.
Put 8 as the next digit of the answer. 
Result so far: 196524.0231958
Subtract 3104 from 3400 to get 296.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2960, and continue the process.

Going ahead to step 16:
388 can be fit into 2960 7 times, resulting in a remainder of 244.
The next digit of our result is 7. 
Result so far: 196524.02319587
Subtract 2716 from 2960 to get 244.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2440, and continue the process.

The final result is 196524.02319587 with a remainder of 2.44e-07.